Doubly stereoconvergent construction of vicinal all-carbon quaternary and tertiary stereocenters by Cu/Mg-catalyzed propargylic substitution

Xiang Pu, Qiu-Di Dang, Lei Yang, Xia Zhang () and Dawen Niu ()
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Xiang Pu: Sichuan University
Qiu-Di Dang: Sichuan University
Lei Yang: Sichuan University
Xia Zhang: Sichuan University
Dawen Niu: Sichuan University

Nature Communications, 2022, vol. 13, issue 1, 1-9

Abstract: Abstract The construction of vicinal, congested stereocenters with high selectivities is of general utility in chemistry. To build two such stereocenters in one step from readily available starting materials is very desirable, but remains challenging. We report here a doubly stereoconvergent, Cu/Mg-catalyzed asymmetric propargylic substitution reaction to convert simple starting materials to products with vicinal tertiary and all-carbon quaternary stereocenters in high yields and excellent diastereo- and enantioselectivities. Both the nucleophiles and the electrophiles employed in this transformation are racemic. This reaction uses earth abundant metal catalysts, operates under ambient conditions, and demonstrates broad substrate scope. The products of this reaction are functional group rich and synthetically versatile. Key to the success of this development is the devise of a Cu/Mg dual catalytic system and the identification of a bulky tridentate pyridinebisimidazoline (PyBim) ligand.

Date: 2022
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DOI: 10.1038/s41467-022-29986-y

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